Have you ever wondered if you should cover your new mini split air conditioner in the winter? As the temperatures start dropping, protecting your AC unit probably crosses your mind. Consider factors such as size, climate, and efficiency with our mini split sizing calculator. Covering a mini split can help shield it from harsh weather and keep it in good working condition for the next cooling season. But is it necessary or even a good idea for every situation? Before you decide to cloak your condenser in a tarp or wrap, let The Trade Table walk you through some things to consider.
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Reasons to Cover Your Mini Split in Winter
There are a few reasons why covering your mini split unit during winter is a good idea.
Protect from snow and ice
The number one reason is to protect the unit from snow, ice, and freezing rain buildup. If left uncovered, snow and ice can build up around the unit, clogging the vents and preventing proper airflow and operation. In severe cases, the weight from snow and ice accumulation could even damage the unit. Covering the unit with a waterproof tarp, sheet, or commercial cover can prevent this.
Improve efficiency
Covering the unit can also help improve its efficiency during winter. The cover acts as an extra layer of insulation, trapping heat around the unit. This means the unit doesn't have to work as hard to heat the air, so it operates more efficiently. You'll notice lower energy bills and reduced run times.
Extend lifespan
When a mini split runs more efficiently, it lasts longer. Because the unit isn't working as hard, components like the compressor, condenser coils, and fan motor experience less stress and wear. This can extend the overall lifespan of the unit by several years. For the cost of a cover, that's a pretty solid return on investment.
Protect components
In addition to snow and ice, a cover also protects the mini-split from other environmental factors like wind, rain, dirt, and debris. Keeping sensitive components like coils, motors and wiring protected from the elements when not in use will help prevent corrosion and ensure reliable operation for years to come.
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Reasons Not to Cover Your Mini Split in Winter
There are a few good reasons not to cover your mini split unit during winter.
First, covering the unit can trap heat and moisture, which reduces efficiency and shortens the lifespan. Mini-splits are designed to operate in a range of weather conditions. Covering them disrupts airflow and circulation, causing them to overheat. This can damage internal components over time.
Second, covers often do little to improve heating. Mini-splits are very efficient at producing and directing heat. Any cover you add is unlikely to provide substantial improvements, especially if your unit is properly sized for the space. In some cases, covers can reduce heat output by up to 30% due to trapped hot air and restricted airflow.
Finally, covers tend to be unattractive and difficult to remove. Most covers are made of vinyl, canvas, or mesh fabric that won’t complement your home’s exterior. Putting covers on and taking them off each season also adds extra hassle and work for you. It’s best to choose a mini split suitable for your climate so you can avoid covers altogether.
Rather than covering your mini split in winter, focus on proper maintenance and occasional cleaning to maximize efficiency and longevity. Keep the area around the unit clear of debris and snow for optimal performance. If heating seems inadequate, it may indicate the need for servicing to recharge refrigerant or replace worn parts. But in general, mini splits are built to handle cold weather just fine without the need for covers.
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Tips for Caring for Your Mini Split in Winter
Caring for your mini split heat pump during the winter requires a few extra precautions to keep it running efficiently and prevent damage.
Cover the Outdoor Unit
The outdoor condenser unit is exposed to the elements, so covering it in the winter is a good idea. You can purchase a tailored mini split cover, or improvise with a waterproof tarp, breathable canvas, or heavy-duty plastic sheeting. Secure the cover around the base to protect it from wind and ensure moisture doesn’t collect underneath. Covering the unit will shield it from snow, ice, and freezing rain which could inhibit performance or cause damage.
Clear Snow and Ice
If snow or ice does accumulate around the outdoor unit, carefully clear it away. Make sure vents and intakes remain unobstructed so the system can function properly. Use a brush to gently remove any snow or ice from the fins of the condenser coil. Never use sharp tools which could puncture or bend the delicate fins.
Run the Fan
It’s a good idea to run the indoor fan on occasion during the winter even when the heating isn’t running. This circulates the air in the home and prevents stagnation. It also keeps components like the fan motor and bearings lubricated which prevents issues when the heating is activated again. Run the fan for at least 15-30 minutes a day or a few hours a week.
Change Filters
Replace or clean the mini split’s air filters more frequently in the winter. Dirty filters reduce airflow and efficiency which means higher energy usage and cost. Clogged filters also put extra strain on the system. As a rule of thumb, check your filters monthly in the winter and change them every 2-3 months or if they appear dirty.
Consider a Timer
Using a programmable thermostat or timer, you can set your mini-split to turn on slightly before you get up in the morning or come home in the evening. This ensures the space is comfortable when you’re there, but saves energy when you’re away or sleeping. A timer can also be used to run the indoor fan as recommended to improve circulation and keep components lubricated.
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Cover or Not? Weigh Pros & Cons for Mini Split Winter Care
So there you have it, the pros and cons of covering your mini split in winter. Ultimately, the decision comes down to your needs and climate. If efficiency and cost savings are your top priorities, covering the unit is probably your best bet. But if you live in an area with lots of snow and ice, covering could lead to overheating and damage. Or if you simply can't be bothered with the hassle, leaving it uncovered likely won't cause any major issues. At the end of the day, you know your situation best. Whichever you choose, make sure to clear snow from around the unit and consider a protective cover designed specifically for splits. Stay cozy this winter, and good luck with making the right call for you!
Table of Contents: Should I Cover My Mini Split in Winter?
